Grey screen when running Valley benchmark

Hardware Hub GPU
1

Hi,

So I just finished building my new PC today. I have not overclocked anything yet and wanted to run valley to see how my new graphics card benchmarked. but when I get about 5 minutes into Valley the screen goes grey and I have to turn off my computer via the PSU. one thing I noticed was during the benchmark my clock speed was 1333mHz even though i didn't overclock and it says its 993mHz on GPU-Z, also, my memory speed is 3502 when it's only supposed to be 1502. All my drivers are updated and I even tried using an old one.

Specs:

i7 4770k

Kraken x60 

Asus ROG maximus Vi Hero

Corsair Veangance 1600mhz ram

XFX 80+ Bronze 750w PSU

EVGA GTX 780 Classified

 

 

2

The clock speed is likely due to GPU boost doing its thing, i think that what you should do is reduce the clocks 200mhz and see what happens, also increacing the power limit is generally what you should do anyway